Firefighters who responded after midnight to reports of the explosion were found by five workers evacuating the building that was sent to the hospital in stable conditions, Columbus Assistant Public Information Officer Rebecca Diehm said Thursday.
Diehm said two people were trapped in the building and were transported in crisis to an Ohio State University hospital.
An official looking for an officer inside the facility said one person was missing and, after “deep searching the building”, said “the person has not been found yet”.
The cause of the explosion and the fire, which brought more than 100 firefighters to the scene, is under investigation.
Diehm added that nearby local businesses were closed in the evening and that evacuation of homes was not required.
This developing story will be updated.